PHP - Delay on redirect

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I\'m using the following code to use as a form of nulling referring script and it works perfectly but it just redirects them straight to the target URL.

How would I

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感情败类

2020-12-30 15:43
What about using sleep()?
```
function method1(...) {

sleep(5);

... rest of the code
```
Note however that it is more recommended to use Vahe Shadunts's answer, which uses header() instead.
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迷失自我

2020-12-30 15:52
The refresh header does the job but I'd like to highlight some potential issues:
- It is not specified in the HTTP standard. Wikipedia says:
  
  Proprietary and non-standard: a header extension introduced by Netscape and supported by most web browsers.
  
  But it has been around for almost 20 years now and I don't know of any browser that does not support it (could not find a reference though)
- Some browsers do not use the cache on a page redirected with refresh. It has been demonstrated for Internet Explorer here: http://blogs.msdn.com/b/ieinternals/archive/2010/05/13/meta-refresh-causes-additional-http-requests.aspx and I coud reproduce it on Firefox. Chrome does not have this issue.
Alternative: JavaScript

You can add a JavaScript on the intermediate page, that opens a new page after X seconds. Add this at the bottom of the page to redirect to http://www.example.com/target after 5 seconds:
```
<script type="text/javascript">
    window.setTimeout(function() {
        window.location.href='http://www.example.com/target';
    }, 5000);
</script>
```
Combination

As a bonus, you can fall back to the refresh header if JS is disabled, using the meta directive http-equiv that tells the browser to act as if a certain HTTP header has been sent. Because it is part of the HTML source, you can wrap it in a <noscript> element. Add this to your <head> additionally to the JavaScript above:
```
<noscript>
    <meta http-equiv="refresh" content="5;url=http://www.example.com/target" />
</noscript>
```
Now, the page redirects with JavaScript if available for the best performance, and uses refresh otherwise.
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有刺的猬

2020-12-30 16:07
You can send php header with timeout refresh. http://php.net/manual/en/function.header.php
```
<?php 
  header( "refresh:5; url=wherever.php" ); 
?>
```
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PHP - Delay on redirect

Note however that it is more recommended to use Vahe Shadunts's answer, which uses header() instead.

Alternative: JavaScript

Combination

Note however that it is more recommended to use Vahe Shadunts's answer, which uses `header()` instead.